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Main Title: Homogeneous equilibrium model for geomechanical multi-material flow with compressible constituents
Author(s): Aubram, Daniel
Type: Article
Abstract: Multi-material flow generally describes a situation where several distinct materials separated by sharp material interfaces undergo large deformations. In order to model such flow situations in the context of geomechanics and geotechnical engineering, a theoretical framework is presented which introduces a possible two-phase coupled saturated granular material behavior among the different materials. This is achieved by extending the technique of local volume averaging to a hierarchy of three spatial scales, based on a product of two indicator functions. A homogeneous equilibrium mixture model is subsequently derived for an example flow consisting of bulk solid, bulk fluid, and undrained granular material with compressible constituents. The closure relations are provided at the macroscale, including those describing granular behavior covering the full frictional-collisional flow regime and bulk material volume fraction evolution. The paper discusses the advantages and restrictions of the proposed mixture model and addresses its application and full-scale numerical implementation.
Subject(s): multi-material flow
large deformations
granular material
volume averaging
closure relation
homogeneous equilibrium
Issue Date: 9-Apr-2016
Date Available: 8-Aug-2018
Language Code: en
DDC Class: 532 Mechanik der Fluide, Mechanik der Flüssigkeiten
550 Geowissenschaften, Geologie
629 Andere Fachrichtungen der Ingenieurwissenschaften
Sponsor/Funder: DFG, FOR 1136, Modellierung von geotechnischen Herstellungsvorgängen mit ganzheitlicher Erfassung des Spannungs-Verformungs-Verhaltens im Boden (GeoTech)
DFG, SA 310/26-1, Numerische Modellierung der Herstellung von Rüttelinjektionspfählen
DFG, SA 310/26-2, Numerische Modellierung der Herstellung von Rüttelinjektionspfählen
Journal Title: Journal of Non-Newtonian Fluid Mechanics
Publisher: Elsevier
Volume: 232
Publisher DOI: 10.1016/j.jnnfm.2016.04.001
Page Start: 88
Page End: 101
ISSN: 0377-0257
TU Affiliation(s): Fak. 6 Planen Bauen Umwelt » Inst. Bauingenieurwesen » FG Grundbau und Bodenmechanik
Appears in Collections:Technische Universität Berlin » Publications

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